IR2151PBF datasheet by International Rectifier

IR2151PBF Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VCC pin?
  The maximum voltage that can be applied to the VCC pin is 18V, but it's recommended to keep it below 15V for reliable operation.
• How do I calculate the minimum bootstrap capacitor value?
  The minimum bootstrap capacitor value can be calculated using the formula: CBOOT ≥ (VCC x tON) / (VBOOT x RBOOT), where tON is the on-time of the high-side switch, VBOOT is the bootstrap voltage, and RBOOT is the bootstrap resistor.
• What is the purpose of the SD pin, and how do I use it?
  The SD (Shutdown) pin is used to disable the IC and reduce power consumption. To use it, connect the SD pin to a logic low signal to shut down the IC, and connect it to a logic high signal or leave it open to enable the IC.
• How do I choose the right bootstrap diode and resistor values?
  Choose a bootstrap diode with a reverse recovery time less than 100ns and a current rating higher than the peak current of the high-side switch. The bootstrap resistor value should be chosen to limit the inrush current during startup and to ensure the bootstrap capacitor is charged within a few hundred microseconds.
• What is the maximum frequency of operation for the IR2151PBF?
  The maximum frequency of operation for the IR2151PBF is 500kHz, but it's recommended to operate at a frequency below 400kHz for reliable operation and to minimize EMI.